Questions relating to the dynamic family of functions in Mathematica, such as Dynamic, DynamicModule and Manipulate.

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6
votes
2answers
294 views

A good way to manage code in a complicated CDF?

When doing complicated programming in a Mma notebook I define several functions that I use in my higher level funtions, and I use a "Subsection" cell for each definition. For example I might write: ...
6
votes
3answers
325 views

Question about modifying a Slider2D control

Background: I want to develop a custom control, based on a 2D slider. I currently have this ( working ) example. ...
6
votes
1answer
229 views

Dialog inside Dynamic Module [duplicate]

The following doesn't appear to work: DynamicModule[{}, Button["Press Me", ChoiceDialog["OK or Cancel?"]]] When I press the button labelled "Press Me", a dialog ...
6
votes
1answer
334 views

Efficient dynamic drawing

So for example I have this code: ...
6
votes
2answers
159 views

There is an issue with Manipulate in which it updates its argument twice in V10

I have asked this question before (here) and I thought that the issue is only when moving the Notebook window. It appears that Manipulate is working in weird manner. ...
6
votes
1answer
369 views

Using more than one set of Locators in a Manipulate

I need to add locators dynamically to different sets. With one set this works OK: ...
6
votes
1answer
113 views

Can a field be used for both input and output (example: exchange rate calculator)

Suppose I want to build a simple currency converter like this one: The functionality is straightforward: enter an amount in any field box, it gets converted into other currencies whose fields are ...
6
votes
1answer
70 views

Bug with Initialization in DynamicModule?

In exploring Tracking Initialization, I came across this. The following usually shows a value for x of 300000 to ...
6
votes
2answers
143 views

Making ColorSetter work like a PasteButton

I might be missing something obvious here. I am building a palette for constructing code to make certain graphics. The idea is that my colleagues can click buttons instead of having to know the right ...
6
votes
3answers
411 views

Interpolation with boundary conditions

I'm working on a sales projection, trying to create some flexibility in handle the forecast using locators. The toy code is something like this: ...
6
votes
2answers
190 views

How to access off-cell mouse position inside an EventHandler?

Consider the following example. First, I print the dynamically updated value of the actual position of the mouse, then I print pt, which is the same but is only ...
6
votes
2answers
102 views

Injecting list of controls into manipulate

I am trying to program a method to manually move around graph vertices, and then output the new coordinates. I'd like to turn this into a function that can be called with a variable number of ...
6
votes
1answer
237 views

Poincaré map for dynamic billiard

There's a very nice demonstration of dynamic billiard written by Dan S. Reznik that can be found on demonstrations wolfram(along with the code): here I was thinking whether it would be possible to ...
6
votes
2answers
206 views

Creating a slider that instead of setting, increases/decreases a variable

The objective: Create a slider that, when displaced from the center, increases-decreases the value of another variable at a rate proportional to the displacement. So, I create a slider that ...
6
votes
1answer
279 views

LocatorPane and multiple EventHandlers, PassEventsDown option

Consider the following piece of code from Heike as an ( accepted ) answer on LocatorPane, selecting multiple Locators - Basically the code implements dragging polygons on a LocatorPane. ...
6
votes
1answer
951 views

How to make a dynamic stopwatch?

For some experiments I need some basic timer function. I tried various methods, and neither of them are fully satisfactory. What I need is a button, that starts/stops a timer, resets timer with each ...
6
votes
1answer
146 views

How to inherit options by scoping?

Consider the following example: you have a function framed producing a cell with a button that, when pushed, calls framed again. ...
6
votes
1answer
160 views

How can I make sure all InputFields have values before processing a nb form?

This is a two part problem: I have a form that accepts both numeric and text inputs, then runs a function using a "process" Button. The issue I'm having is users that forget to fill out all of the ...
5
votes
3answers
168 views

Creating a Tooltip that knows what platform is currently being used

I have Mathematica 8 on my PC. I also have a new Mac with CDF-player, but not Mathematica. I want a Tooltip that shows one thing if running on a PC, and something ...
5
votes
3answers
430 views

How do you properly create Buttons to change dynamic variables using Table

In this example, I want a series of four buttons to change the value of a variable that is used dynamically to drive a plot. I am trying to figure out why using Table around the buttons causes a ...
5
votes
2answers
1k views

Equivalent of MATLAB's “hold on” function

I'm making an animation where the number of iterations is known. I tried using Dynamic, as I prefer updating in real time over generating data before plotting. I ...
5
votes
2answers
195 views

How to make DynamicModule work without an extra ENTER

I've been trying to learn more about DynamicModule (I do not use them, as I used Manipulate all the time). After some time ...
5
votes
3answers
366 views

Unexpected Setter Bar Behavior when Manipulate Nested in Dynamic Module

Consider this code: DynamicModule[{x, y}, x[t_] := t^2 + 5; y[t_] := t^3 + 5; Manipulate[Plot[fcn[t], {t, -5, 5}], {fcn, {x -> "Square", y -> "Cubic"}}]] ...
5
votes
1answer
290 views

“Masking” an InputField

In building an assignment for my class, I would like set up an InputField, where they will enter a function. I was wondering if there was a way to "continuously" check if their function is being ...
5
votes
2answers
126 views

Checkbox behaving weird when variables are local

I have a DynamicModule in which I need a checkbox with a Max in the dynamic part: ...
5
votes
1answer
188 views

How to add several Locators to a Graphic with a mouse click?

Background: Suppose I have something like this: ...
5
votes
2answers
313 views

How to dynamically update Locator[] constraints?

I need to visualize Menelaus' theorem for a triangle with moving locators for each of six points. So the vertexes of the triangle can move in any possible way, and the three points on the sides of the ...
5
votes
1answer
314 views

Basic question about Dynamic

Please consider the following: ...
5
votes
1answer
212 views

Using free-form linguistic input in a dynamic input field

I've been playing around with dynamic input fields; here's a basic example, which just consists of an input field where the user can enter a function and then a button that can be clicked to graph the ...
5
votes
5answers
1k views

sliding a tangent line along a curve

I am confused by Dynamic. I am trying to slide a tangent line along a curve, without using DynamicModule, so that I can include ...
5
votes
2answers
298 views

How to create a ListLinePlot with a layout analogous to ChartLayout -> “Stacked”?

I am using 3 checkboxes as desktops, portables and ipods in such a way that when I click to desktops it should shows ListLinePlot of ...
5
votes
3answers
462 views

Printing a Dynamic variable inside Dynamic

I'm trying to Print the variable a inside the Dynamic wrapper. Seems like such a simple question, but I haven't been able to get ...
5
votes
1answer
216 views

Control variable and body variable decoupling in Manipulate

This issue was raised as an offside problem in this thread. Consider the following example, that does not work as expected: ...
5
votes
2answers
86 views

Using gamepad without dynamic

I am a novice using Mathematica. I program regularly using c like languages though. Now i work on a simulation of a vehicle. I have a loop that calculates the next state of the physical model every dt ...
5
votes
1answer
196 views

How to make a piece of a pie chart change color upon clicking it?

I am trying to use the EventHandler and have managed to make the text change color upon clicking it, but cannot seem to make each piece of the pie chart change ...
5
votes
1answer
195 views

Using the keyboard to interactively and dynamically specify coordinates in a grid (a la Battleship board game)

In Mathematica, it is possible to create a Table or Grid of \[Placeholder] boxes. For ...
5
votes
1answer
189 views

Why does Dynamic output cause CPU usage when onscreen?

I write such a line in Mathematica: {Slider[Dynamic[s]], Dynamic[f[x_] := s*x]} After evaluation, the CPU immediately runs at full power. And if you scroll the ...
5
votes
1answer
396 views

Progress indicator with shared variables

I'm trying to create a custom progress indicator for a parallelized computation, using Dynamic and SetSharedVariables to display ...
5
votes
1answer
67 views

Using a progress bar in a functional expression

If we have a procedural construct like a Do loop or Table, it is straightforward to make a progress bar to indicate the percent ...
5
votes
1answer
133 views

Is there a way to make an interactive plot so one can pan and zoom?

My googling efforts returned nothing so I thought I'd ask here. I often make a ListPlot[] with a huge array, and sometimes it has smaller features that I'd like to take a closer look at, but aren't ...
5
votes
2answers
103 views

How to robustly apply ToBoxes to a Dynamic expression?

Inserting a Dynamic object in a boxform expression messes up syntax colouring. See the following example. where the variable ...
5
votes
1answer
182 views

How can I use Dynamic to run a script when a new file is added to a directory?

I have an external program saving files to some directory on my hard disc. I'd like to run a script that imports and runs a script on each file as it is added to the directory. Is there a simple way ...
5
votes
2answers
431 views

Interactively select a row/column of a Grid

I need a simple way to display tabular data (preferably with Grid) and also be able to select a row or column of the table. I've tried different approaches, but I ...
5
votes
1answer
98 views

ListPicker with conditional selection

I am reading data from a SQL Database and want to manually sellect multiple rows. ListPicker works very nicely, the only added complication is that I need to not only select the records, but also ...
5
votes
1answer
105 views

Why does a heavy background slow LocatorPane from updating, even if only the locators are Dynamic?

I'm having some trouble getting a dynamic plot to operate efficiently, and I think I've tracked down at least part of the problem to some pretty weird behaviour on the part of ...
5
votes
1answer
467 views

Enabled option for slider in Manipulate not updating dynamically

In a Manipulate expression I have a slider control which has the Enabled option ...
5
votes
1answer
270 views

How to convert String to an Expression inside Manipulate which depends on control variable

Normally, in Global context, these 2 are equivalent eqn = "r-x"; r = -2; Plot[ToExpression[eqn], {x, -5, 5}] and ...
5
votes
1answer
369 views

Make EventHandler work for clicks and keys in a Dynamic display

I am trying to write a way that will do certain events depending on what screen is showing. What happens so far is that the screen will change in accordance to a click, but when you try to do the ...
5
votes
1answer
227 views

What changes in Dynamic have occurred from Mathematica 7 to Mathematica 8 that might induce incompatibilities?

I have a function that outputs a Manipulate (say FAnimated[params_]:= Manipulate[F[params,t], {Time, Animator[t]}] where F ...
5
votes
1answer
179 views

Dynamic panel crashes Mathematica 10.0.0.0

This answer by @paw have revealed a bug that causes Mathematica v 10.0.0.0 to crash the GUI and kernel. So far the offending code is this: ...